Any footage with the Dark
Dimension in it (as shown here ) ) is new footage
because there was no such thing in ZyuRanger. Something that is worth
mentioning is the fact that Burai is the Yamato Tribe Prince and he's
Geki's older brother. Geki wasn't born into the Tribe, he was actually
the son of the Black Knight however the Black Knight was going to be
executed and the only way to prevent that was to turn over his son to
the Yamato Tribe which he did however the Knight used this chanc for a
revolt opportunity and he and the Yamato King fought until the Black
Knight was killed in the battle. Burai had been training daily for
revenge against the King however he was never able to get his revenge
due to the fact that the King was killed during 1 of Bandora's attacks.
Burai now blames Geki for everything that has happened to him.

In ZyuRanger, the Sword of
Darkness was actually an evil Sword that causes its wielder to become
insane. Only Daizyujin knew about it, this is why he came to deal with
the Dragon Ranger, he wasn't planning on fighting him.